OBJECTIVES/HYPOTHESIS The goal of our study is to identify the number of Endoscopic Sinus Surgery (ESS) cases required to obtain competency in ESS, using a previously validated assessment tool. STUDY DESIGN Prospective observational study. METHODS Seventeen residents from Johns Hopkins Otolaryngology-Head & Neck Surgery residency program were evaluated as they performed endoscopic sinus sur...

STUDY OBJECTIVES The Epworth Sleepiness Scale (ESS) is widely used as a subjective measure of sleepiness. To our knowledge, no study has evaluated its reproducibility in the clinical setting. METHODS A retrospective chart review of patients referred to the sleep clinic at Mount Sinai Hospital for evaluation of sleep-disordered breathing from a local private snoring clinic between January 2000...

Epileptic seizures (ESs) in the elderly are recognized as frequent, and potentially difficult to diagnose. Their clinical features and relevant diagnostic problems still remain poorly investigated in hospital populations outside the setting of tertiary referral centres. In this study we attempted to improve the understanding of these aspects in community institutions. We conducted a four-year r...

With the rapid growth of wind energy development and increasing wind power penetration level, it will be a big challenge to operate the power system with high wind power penetration securely and reliably due to the inherent variability and uncertainty of wind power. With the flexible charging–discharging characteristics, Energy Storage System (ESS) is considered as an effective tool to enhance ...

Engineered skin substitutes (ESS) have been used successfully to treat life-threatening burns, but lack cutaneous appendages. To address this deficiency, dermal constructs were prepared using collagen-glycosaminoglycan scaffolds populated with murine dermal papilla cells expressing green fluorescent protein (mDPC-GFP), human dermal papilla cells (hDPC) and/or human fibroblasts (hF). Subsequentl...

As an equilibrium refinement of the Nash equilibrium, evolutionarily stable strategy (ESS) is a key concept in evolutionary game theory and has attracted growing interest. An ESS can be either a pure strategy or a mixed strategy. Even though the randomness is allowed in mixed strategy, the selection probability of pure strategy in a mixed strategy may fluctuate due to the impact of many factors...

Combining an energy storage system (ESS) with a wind farm is an effective way to increase the penetration rate of wind power. ESS sizing is an important part in wind farm planning nowadays. In this paper, a basic method for determining the optimal capacity of an ESS integrated with a wind power generator to meet the requirements of grid integration is presented. With the proposed method, the ne...

BACKGROUND The aim of this multicentre study was to systematically analyse the strengths and weaknesses in the surgical training for endoscopic sinus surgery (ESS) and identify measures that may improve training. METHODOLOGY Using a structured questionnaire, 133 participants of ESS courses in seven centres in Germany, Switzerland and Australia were asked about their experiences during their d...

The concept of an evolutionarily stable strategy (ESS), introduced by Smith and Price [4], is a refinement of Nash equilibrium in 2-player symmetric games in order to explain counter-intuitive natural phenomena, whose existence is not guaranteed in every game. The problem of deciding whether a game possesses an ESS has been shown to be Σ 2 -complete by Conitzer [1] using the preceding important...

Low-grade endometrial stromal sarcoma (ESS) is an uncommon gynecologic malignancy of mesodermal origin. Pulmonary metastasis of low-grade ESS can occur years and decades after the treatment of the primary disease. Low-grade ESS is frequently mistaken as benign uterine neoplasm like uterine leiomyoma, which can potentially lead to a misdiagnosis. We present a case of a 42-year-old woman with low...